Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment

v3.21.1
Property, Plant and Equipment
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at March 31, 2021 and December 31, 2020 consisted of the following:
Estimated Useful
Life (in Years)
March 31, 2021 December 31, 2020
Energy systems
1 - 15 years
$ 3,378,327  $ 3,526,514 
Machinery and equipment
5 - 7 years
1,464,123  1,448,024 
Furniture and fixtures
5 years
193,698  193,698 
Computer software
3 - 5 years
192,865  192,865 
Leasehold improvements * 450,792  450,792 
    5,679,805  5,811,893 
Less - accumulated depreciation and amortization   (3,540,415) (3,528,047)
  $ 2,139,390  $ 2,283,846 
* Lesser of estimated useful life of asset or lease term
Depreciation and amortization expense on property and equipment for the three months ended March 31, 2021 and 2020 was $160,556 and $175,660, respectively.